Ca. Ø39mm, 18K gold, pressed back, serial number 36001-720, manual winding, rare intermediate wheel chronograph with one slider and one pusher, slider for additional measurement, 30-minute counter and here the extremely rare version with 12-hour counter, original dial with blue tachymeter scale, like new leather strap, fine collector's watch, very rare in 18K gold, in working order, but revision recommended because slider function is no longer properly. The watch seems to have never been refurbished and is in a wonderful condition, both case and dial with light patina. The version with hour register with an Extra-Fort Chronograph is extremely rare. A further piece was auctioned in Geneva in 2013 and sold for more than 6,250 Swiss Francs (source: https://www.cortrie.de/go/Zdo).
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